Chuck



(No Model.) 2 SheetsSheet 1.

S412; ARDREY.

CHUCK.

No. 358,916. Patented Mar. 8, 1887.

N. FEIERS. Phmo-Lilhu m hw, Wauhinglom D, C.

2 Sh eetsSheet 2.

S. B. ARDREY.

(N0 Model.)

CHUCK.

No. 358,916. Patented Mar. 8, 1887.

UNITED STATES PATENT OFFICE.

SAMUEL BRA DLEY ARDREY, OF BRlSTOL, PENNSYLVANIA.

, CHUCK.

SPECIFICATION forming part of Letters Patent No. 358,916, dated March8,1887,

Application filed July 29, 1885.

To all whom it may concern:

Be it known that I, SAMUEL BRADLEY AR- DREY, of Bristol, Bucks county,Pennsylvania, have invented a certain new and useful Improvement inLathc-Ohncks, of which the following is a specification.

I will describe a lathe-chuck embodying my improvement in detail, andthen point out the novel features in claims.

In the accompanying drawings, Figure l is a horizontal section of alathechuck embodying my improvement,taken on the plane of the dottedline 00 as Fig. 2. Fig. 2 is a face view of the same on asmaller scale.Fig. 3 is a side view thereof, a certain shell employed in conj unctiontherewith being removed. Fig. 4 is a rear view thereof. Fig. 5 isanother rear view thereof, partly broken away and certain parts shown inFig. 4 being removed. Fig. 6 is a detail,partly in seetion,taken on theplane of the dotted line 1 -y,Fig. 1. Fig. 7 is a transverse section ofone'of the chuck-jaws taken on the plane of the dotted line 2 z,Fig. 1.

Similar letters of reference designate corresponding parts in all thefigures.

A designates the lathespindle. It is provided with a collar, a, and ascrew-th readed portioina, by which the chuck may be secured to thespindle, as is usual.

B designates the hub of the chuck provided with an aperture, 1),extending centrally th rough it. A portion ot'this aperture isscrew-threaded to receive the screw-threaded end a of the lathe-spindle.

G designates the chuck-plate. It is provided with radial grooves c, ofwhich there may be any desired number, but of which I have shown butone. These grooves are shown as cylindrical and as having open ends,opening into the aperture 1) in the hub and also on the periphery of thechuck-plate. Longitudinal slots in the face of the chuck-plate openinginto the grooves c are adapted to receive the necks of jaws D. The jawsD, of which I have shown but one, are provided with portions d, fittingwithin the grooves c, and adapted to be moved back and forth in suchgrooves.

D designates a screw,by which a jaw D may be adjusted toward or from thecenter of the chuck plate. This screw passes centrally Serial No.109,415. (No model.)

through a screw-threaded hole extending longitudinally through theportion (1 of the jaw.

D" designates a set-screw extending through the jaw D, and atrightangles to the screw D. At its inner end this set-screw bearsagainst a segmental block, at, which is screw-threaded upon its inneredge. This screw D engages the screw-th reads in this block. Bylooseningthe setscrew Dithe screw D may be rotated to adjust the jaw D. Bytightening the setscrew, the screw D will be'clamped by the block d andthe screw D, and the jaw D will be locked together. I have shown thisarrangement of parts more clearly in Fig. 7.

I will now describe mechanism which I employ to cause the jaws D to gripand release an article to be turned in the lathe.

E designates bell-crank levers fulcrumed upon pins 6, extending throughsaid levers and through lugs 6 upon the back of the chuckplate 0. Theshort arms of these levers are provided with bifurcated ends 6 extendinginto circumferential g rooves e in heads 0 upon the screws 1. The longarms of the bellcrank levers E likewise have bifurcated ends, whichembrace one of the ends of links a", to which links they are pivotallyconnected. The links 6 are pivotally connected near their other ends toand between one of the ends of a pair of bell-crank levers c Thebell-crank levers e are fulcrumed upon pins eiextendiug through saidlevers and through lugs e" on the back of the chuck-plate. The otherends of the levers c extend backwardly and outside the long arm of thelever E. They are pivotally connected to links e", which links are inturn pivotally connected to lugs e on a ring, I. The ring I surroundsthe hub of the chuck and is loose on said hub, so that it may be movedlongitudinally thereon.

J designates a collar surrounding the ring I and fitting loosely in acircumferential groove in the ring. This collar is, as shown, madein twosections secured together by bolts j. The collar J does not rotate withthe ring I; but it may be manipulated to move said ring longitudinallyupon the hub of the chuck. This manipulation is accomplished by means ofa yoke-lever, J, the arms J of which are piv otally connected near oneof their ends to links j, which links are in turn pivotally connected tobrackets j secured to the head-stock of the lathe. About midway in thelengths of the arms J 2 of the yoke, they are provided with apertures,into which extend projections from the collar J. The yoke is alsoprovided, as shown, with a handle, J When the handle of the yoke ismoved in the direction of the arrow, Fig. 1, the ring I is caused toslide along the hub of the chuck toward the chuck-plate. This operationcauses the bell-crank levers e and E to be rocked through theintermediate links and the screws D, carrying the jaws D, to be movednearer the center of the chuckplate and to grip an article to be turned.An opposite motion imparted to the handle of the lever J causes theparts to operate in a reverse way,and the article to be released. Bythis arrangement and combination of parts, small articles to be turnedup can be inserted in and removed from the chuck without stopping therotation of the lathe, as is ordinarily necessary. By this means,therefore, a great saving is effected both in time and labor.

P designates a cylindrical case or shell, which may be of metal, andwhich incloscs the chuck. The face-plate of this shell, as shown moreclearly in Fig. 2, is detachably secured to the body of the shell bymeans of screws and is provided at about its center with a funnel-shapedopening, T, through which articles to be turned may be inserted andremoved. The shell 1? is secured to a plate, S, which plate is in turnsecured to the shears of the lathe. The plate S is provided withhorizontal slots 8, and the case P with vertical slots 8, whereby theshell P may be properly centered upon the chuck.

It will be seen that when the jaws D are properly set and closed uponthe article to be operated upon the fixed center of the lovers e and thetwo centers of the links 0 will be in alignment, whereby the jaws willbe firmly locked.

Of course, instead of manipulating the yokelever J by hand, it might bemanipulated by any suitable mechanism operated by the foot.

Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. In a lathe-chuck, the combination, with a chuck-plate provided with ahub, of clamping-jaws, screws engaging said clamping-j aws, levers foroperating said clampingjaws engaging said screws, a sliding piecesurrounding said hub, connections comprising links and levers betweensaid sliding piece and the levers first named, and a yoke-lever formanipulating the sliding piece, substantially as specified.

2. In a lathe-cliuck, the combination, with a chuck-plate provided wit-ha hub, of clamping-jaws, screws engaging said clamping-jaws, levers foroperating said clamping-jaws engaging said screws, a sliding piecesurrounding said hub, connections comprising links and levers betweensaid sliding piece and the levers first named, a non-rotary collarsurrounding the sliding piece, and a yokelever having a connection withsaid collar, substantially as specified.

3. In a lathe-chuck provided with a chuckplate and a hub, thecombination of jaws D, screws D, levers E, links 6, levers 6 links 6ring I, collar J, and yokelever J.

a. The combination of the jawsD,the screws D, sct-screws d, and blocksd, substantially as and for the purpose specified.

SAMUEL BRADLEY ARDREY.

Vitnesses:

ANTHONY KENNEDY J OYOE, J EssE OLMSTEAD THOMAS.

